They are best separated by the size and shape of their short bills.

Plovers are found throughout the world, and have short bills.

I guess it is a good thing that the babies have short bills."

They have short bills, which is an adaptation to aerial feeding.

If they eat insects in the water, they will have a short bills.

In 2000, juveniles of every native species showed lower mass and shorter bills than before.

"When they hatch out they have short bills, but it doesn't take them a great while to grow long."

Juveniles have short black feathers on the back of the head down to the neck, shorter bills and brown eyes.

You will see few nice short bills from me, Conscript Fathers.

They have short bills and specialized pads on their heels to protect them from the rough floor of the nest.

Rates on short bills were slightly higher.

There are many small birds with short bills, short wings and all-round vision.

These birds are fairly small and slim, with short bills, round heads and long wings.

Pygmy geese have short bills, rounded heads and short legs.

Shorter bills' rates were only slightly mixed.

Also, males with song A have shorter bills than B males.

Grebes can have long or short bills.

Overall, the Columbidae tend to have short bills and legs, and small heads on large compact bodies.

They are medium-sized nocturnal birds with long pointed wings, short legs and short bills.

Their adaptations include a slender streamlined body, long pointed wings and short bills with wide gape.

Nighthawks are similar in most respects to the nightjars, but have shorter bills and less soft plumage.

Immature birds have shorter bills.

They also have shorter, thicker necks, much shorter bills and frequently fly in tighter flocks.

Like the unrelated swifts and nightjars, which hunt in a similar way, they have short bills, but strong jaws and a wide gape.

They are relatively stocky with shorter bills, legs, and necks than their more familiar cousins, the egrets and "day" herons.